May 16, 2011 at 8:56 A.M. EDT Space Shuttle Endeavour lifted off from Kennedy Space Center in Cape Canavral, Florida.
International Space Station assembly mission which will deliver the Alpha Magnetic Spectrometer and the ELC-3 to the space station. This will be the final mission of Endeavour. Originally thought to be the last space shuttle program flight, one additional flight of Atlantis in June 2011 is now planned.
At 4:20 minutes into the flight Endeavor was traveling toward space at 5,500 miles per hour at an altitude of 63 miles or 35,000 feet.